Cabletron Systems TRMMIM User manual

Brand: Cabletron Systems

Model: TRMMIM

Type: User manual

This manual is also suitable for

TRMIM-62A

TOKEN RING MEDIA INTERFACE MODULE

USER’S GUIDE

NOTICE

Cabletron Systems reserves the right to make changes in speciﬁcations and other information

contained in this document without prior notice. The reader should in all cases consult Cabletron

Systems to determine whether any such changes have been made.

The hardware, ﬁrmware, or software described in this manual is subject to change without notice.

IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL,

INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT

NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR

THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN

ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH

DAMAGES.



Printed in the United States of America

Order Number: 9031753-01 October 1996

SPECTRUM

LANVIEW

, and

FNB

are registered trademarks of Cabletron Systems, Inc.

MMAC

MMAC-M3FNB

MMAC-M8FNB TRMM

TRMMIM

and

TRMIM-62A

are trademarks of

Cabletron Systems, Inc.

All other product names mentioned in this manual may be trademarks or registered trademarks of

their respective companies.

Printed on Recycled Paper

NOTICE

FCC NOTICE

This device complies with Part 15 of the FCC rules. Operation is subject to the following two

conditions: (1) this device may not cause harmful interference, and (2) this device must accept any

interference received, including interference that may cause undesired operation.

NOTE:

This equipment has been tested and found to comply with the limits for a Class A digital

device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable

protection against harmful interference when the equipment is operated in a commercial environment.

This equipment uses, generates, and can radiate radio frequency energy and if not installed in

accordance with the operator’s manual, may cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely to cause interference in which case the user

will be required to correct the interference at his own expense.

WARNING:

Changes or modifications made to this device which are not expressly approved by the

party responsible for compliance could void the user’s authority to operate the equipment.

DOC NOTICE

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital

apparatus set out in the Radio Interference Regulations of the Canadian Department of

Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables

aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique

édicté par le ministère des Communications du Canada.

VCCI NOTICE

This equipment is in the 1st Class Category (information equipment to be used in commercial and/or

industrial areas) and conforms to the standards set by the Voluntary Control Council for Interference

by Information Technology Equipment (VCCI) aimed at preventing radio interference in commercial

and/or industrial areas.

Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be

caused to radios and TV receivers, etc.

Read the instructions for correct handling.

NOTICE

iii

CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT

IMPORTANT:

Before utilizing this product, carefully read this License Agreement.

This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”)

that sets forth your rights and obligations with respect to the Cabletron software program (the

“Program”) contained in this package. The Program may be contained in ﬁrmware, chips or other

media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME

BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND

THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT

AGREE TO THE TERMS OF THIS AGREEMENT, PROMPTLY RETURN THE UNUSED

PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.

CABLETRON SOFTWARE PROGRAM LICENSE

1. LICENSE

. You have the right to use only the one (1) copy of the Program provided in this

package subject to the terms and conditions of this License Agreement.

You may not copy, reproduce or transmit any part of the Program except as permitted by the

2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the

Program.

3. APPLICABLE LAW. This License Agreement shall be interpreted and governed under the laws

and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and

venue of the New Hampshire courts.

EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITY

1. EXCLUSION OF

WARRANTY. Except as may be specifically provided by Cabletron in

writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including

its documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO

YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IMPLIED, INCLUDING

BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND

FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE

ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.

2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL

CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER

(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS,

PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL,

INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS)

ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT,

EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH

DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR

LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR

ON THE DURATION OR LIMITATION OF IMPLIED WARRANTIES, IN SOME

INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO

YOU.

NOTICE

UNITED STATES GOVERNMENT RESTRICTED RIGHTS

The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer

software” submitted with restricted rights in accordance with Section 52227-19 (a) through (d) of the

Commercial Computer Software - Restricted Rights Clause and its successors, and (c) in all respects

is proprietary data belonging to Cabletron and/or its suppliers.

For Department of Defense units, the product is licensed with “Restricted Rights” as deﬁned in the

DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1) (ii) and its

successors, and use, duplication, disclosure by the Government is subject to restrictions as set forth in

subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at

252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester, New Hampshire 03867-0505.

CONTENTS

CHAPTER 1 INTRODUCTION

1.1 Getting Help.................................................................................1-2

1.2 Document Conventions...............................................................1-2

1.3 Using This Manual.......................................................................1-2

1.4 TRMIM-62A Features..................................................................1-3

1.4.1 Active TCU Lobe Ports ...................................................1-3

1.4.2 Jumper-Selectable Ring Speed......................................1-4

1.4.3 Speed-Fault Protection...................................................1-4

1.4.4 Beaconing Protection......................................................1-4

1.4.5 TRMIM-62A Management ..............................................1-5

1.4.6 Visual Monitoring With LANVIEW LEDs.........................1-5

1.5 Related Manuals..........................................................................1-5

1.6 Recommended Reading..............................................................1-6

CHAPTER 2 REQUIREMENTS AND SPECIFICATIONS

2.1 Installation Guidelines .................................................................2-1

2.2 Management Module Requirements ...........................................2-2

2.3 Cabling Guidelines ......................................................................2-2

2.3.1 Maintaining Port/Cabling Impedance Matching ..............2-2

2.3.2 Recommended Lobe Lengths.........................................2-2

2.4 Setting The Ring Speed ..............................................................2-3

2.4.1 Management Configuration Overrides............................2-4

2.5 General Specifications.................................................................2-5

2.5.1 Safety..............................................................................2-5

2.5.2 Electromagnetic Compatibility (EMC).............................2-5

2.5.3 Physical ..........................................................................2-5

2.5.4 Environmental.................................................................2-5

CONTENTS

CHAPTER 3 INSTALLATION

3.1 Unpacking And Handling The TRMIM-62A..................................3-1

3.2 Installing The TRMIM-62A ...........................................................3-2

3.3 Attaching Stations........................................................................3-4

3.4 Checking The Installation.............................................................3-6

CHAPTER 4 MONITORING AND TROUBLESHOOTING

4.1 Using LANVIEW LEDs.................................................................4-1

4.2 Troubleshooting The Network......................................................4-3

INDEX

1-1

CHAPTER 1

INTRODUCTION

Welcome to the

TRMIM-62A

Token Ring Media Interface Module

User’s Guide

. This manual describes how to conﬁgure, install, and attach

stations to the TRMIM-62A. It also describes how to monitor the

operational status of the module and how to troubleshoot any operational

or installation problems that may arise.

The TRMIM-62A (see Figure 1-1), is an IEEE 802.5 compliant Token

Ring Media Interface Module (MIM) providing 12 coaxial lobe

connection ports. It is designed for installation into Cabletron Systems

series of Multi Media Access Centers (MMACs).

Figure 1-1 The TRMIM-62A

COAXIAL

TOKEN RING

ING

TRMIM-62A

ERR

MGMT

16Mb

INTRODUCTION

1-2

1.1 GETTING HELP

If you need technical assistance with the TRMIM-62A, or if you have any

questions, comments, or suggestions concerning this manual, contact

Cabletron Systems Technical Support:

By phone (603) 332-9400

Monday-Friday; 8

. – 8

. Eastern Time

By CompuServe GO CTRON from any ! prompt

By Internet mail [email protected]

By FTP ctron.com or 134.141.197.25

anonymous

Password

your email address

1.2 DOCUMENT CONVENTIONS

The following conventions are used throughout this document:

1.3 USING THIS MANUAL

Prior to installing and operating the TRMIM-62A, read through this

manual to familiarize yourself with the features of the TRMIM-62A. You

should have a general working knowledge of the IEEE 802.5 standard for

Token Ring networks before installing and operating the TRMIM-62A or

attempting to troubleshoot any installation/network problems you may

encounter.

NOTE

Calls the reader’s attention to information that may be of

special importance

CAUTION

Contains information essential to avoid damage to the

equipment

Warns against any action that could result in equipment

damage or personal injury

INTRODUCTION

1-3

This manual is organized as follows:

Chapter 1,

Introduction

, describes how to get technical assistance,

document conventions, the manual’s organizational structure, and

TRMIM-62A features and capabilities. It also lists related manuals and

reference sources.

Chapter 2,

Requirement and Speciﬁcations

, provides installation and

cabling guidelines for ensuring optimal performance from the installation.

It also describes how to conﬁgure the TRMIM-62A ring speed and lists

safety, physical, and environmental speciﬁcations.

Chapter 3,

Installation

, describes guidelines and procedures for

unpacking and handling, conﬁguring, and installing the TRMIM-62A and

for connecting stations to the TRMIM-62A.

Chapter 4,

Monitoring and Troubleshooting

, describes how to use

LANVIEW LEDs, Cabletron Systems front-panel diagnostic and status

monitoring system. It also describes troubleshooting procedures used to

help resolve network installation problems.

1.4 TRMIM-62A FEATURES

This section describes TRMIM-62A features and capabilities.

1.4.1 Active TCU Lobe Ports

The TRMIM-62A’s twelve 93-ohm BNC Trunk Connection Unit (TCU),

or lobe, ports feature active circuitry that regenerates and reshapes

incoming token passing signals. All ports employ the Differential

Manchester Encoding signal technique and support connection to RG 62

93-ohm coaxial cable.

NOTE

The TRMIM-62A lobe ports support network station

attachments only. Ports

cannot

be conﬁgured to support

Ring In/Ring Out applications.

INTRODUCTION

1-4

1.4.2 Jumper-Selectable Ring Speed

The TRMIM-62A has a ring speed jumper located on the component

board for conﬁguring the ring operating speed. Section 2.4 provides

instructions for setting the ring speed and information about conditions

under which the network’s default ring speed setting, speciﬁed on the

management module in the MMAC, may override the setting you

establish for the TRMIM-62A with the ring speed jumper.

1.4.3 Speed-Fault Protection

The TRMIM-62A has a speed-fault protection circuitry that prevents the

ring from beaconing in the event that a station conﬁgured to run at an

operating speed different than the TRMIM-62A’s operating speed is

connected to a TRMIM-62A lobe port. It prevents beaconing by

automatically disabling the port detecting the speed-fault violation. The

port’s corresponding LED indicates the port bypassed, and the station is

denied access to the ring. See Chapter 4 for more information about

LEDs.

1.4.4 Beaconing Protection

Protection against debilitating beaconing conditions is provided by the

Cabletron Systems Automatic Beacon Recovery Process (ABRP)

algorithm, included with the operating code of the management modules

installed in the MMAC with the TRMIM-62A. ABRP employs

multi-faceted recovery procedures in the event that a beaconing condition

originating at or from the TRMIM-62A or other components constituting

the network is detected by the management module. ABRP ensures that

defective network segments are swiftly isolated from operational network

segments.

NOTE

Check the 16Mb LED on the front panel of the TRMIM-62A to

determine the TRMIM-62A ring operating speed. To avoid

speed fault errors, ensure that the station inserting into the ring

is running at the same ring speed as the ring.

INTRODUCTION

1-5

1.4.5 TRMIM-62A Management

A variety of network management tools can be used to manage and

monitor the TRMIM-62A. Cabletron Systems Local Management is the

COM-port accessible management application embedded in all Cabletron

Token Ring Management Modules. Other tools include the family of

Cabletron Systems SPECTRUM remote-management applications.

1.4.6 Visual Monitoring With LANVIEW LEDs

LANVIEW LEDs (Light Emitting Diodes) located on the front panel of

the module provide a visual monitoring and diagnostic system for the

TRMIM-62A.They indicate the ring speed, the presence of a hardware

error, the management status of the module, and the operational status of

lobe ports. See Chapter 4 for a complete description of LED functions.

1.5 RELATED MANUALS

This section lists Cabletron Systems manuals shipped with products

typically used in conjunction with the TRMIM-62A. They provide

necessary technical information about their products’ interoperability

with the TRMIM-62A and other Token Ring devices.

MultiMedia Access Center Overview and Set Up Guide

(information

about setting up an MMAC)

TRMM/TRMMIM Installation Guide

(information about conﬁguring

and installing the Token Ring management modules)

TRMM/TRMMIM Local Management User’s Guide

(information about

monitoring and managing the Token Ring network)

TRBMIM-T Installation Guide

(information about conﬁguring and

installing the Token Ring management module)

TRBMIM/TRBMIM-T Local Management User’s Guide

(information

about monitoring and managing the Token Ring network)

TRMM-2 User’s Guide

and the

TRMM-4 User’s Guide

(information

about conﬁguring and installing the Token Ring multi-channel

management modules)

TRMM-2 Local Management User’s Guide

and the

TRMM-4 Local

Management User’s Guide

(information about monitoring and managing

the Token Ring network)

INTRODUCTION

1-6

1.6 RECOMMENDED READING

The following publications provide information useful for designing and

implementing Token Ring networks.

Local Area Networks

IEEE Standard 802.5 Token Ring Access Method

And Physical Layer Speciﬁcations

Commercial Building Wiring Standard, TIA/EIA-568A Standard

2-1

CHAPTER 2

REQUIREMENTS AND SPECIFICATIONS

Before you install the TRMIM-62A, review the installation requirements

and operating speciﬁcations outlined in this chapter. Failure to follow

these guidelines when installing the TRMIM-62A could result in poor

network performance.

2.1 INSTALLATION GUIDELINES

Observe the following guidelines when installing the TRMIM-62A:

• The MMAC must be conﬁgured with an FNB, (either an

MMAC-3FNB, MMAC-5FNB, MMAC-8FNB or an

MMAC-M3FNB, MMAC-M5FNB, MMAC-M8FNB). A Token Ring

network cannot be established in an MMAC without an FNB

backplane.

• The TRMIM-62A can only be installed into any slot on the

MMAC-M5FNB/M8FNB or MMAC-5FNB/8FNB except the

right-most management slot. It can only be installed into any slot on

the MMAC-M3FNB or MMAC-3FNB except the bottom

management slot.

• Ensure that the MMAC hub into which you will be installing the

TRMIM-62A has the recommended number and type of power supply

modules. Refer to the documentation included with each MMAC

model for information about power supply requirements.

NOTE

The FNB is a full-height, full-width backplane that links

Cabletron Systems Token Ring products in the MMAC.

MMAC-3s, MMAC-5s, and MMAC-8s without an FNB can be

upgraded with an FNB, providing greater ﬂexibility in

conﬁguring your system. Contact your Cabletron Systems

representative for more information.

REQUIREMENTS AND SPECIFICATIONS

2-2

2.2 MANAGEMENT MODULE REQUIREMENTS

This section lists Token Ring management modules with their ﬁrmware

versions required for interoperability with the TRMIM-62A:

Management Module Firmware Version

TRMM/TRMMIM 3.01.01 or greater

TRMM-2/TRMM-4 01.02.01 or greater

TRBMIM/TRBMIM-T 2.03.01 or greater

2.3 CABLING GUIDELINES

Take care in planning and preparing the cabling and connections for the

network. The quality of the connections, the length of cables, and other

conditions of the installation are critical factors in determining the

reliability of the network. Work area wall plates/outlets used for the

network should be clearly labeled as supporting Token Ring network lobe

connections.

2.3.1 Maintaining Port/Cabling Impedance Matching

Impedance matching between TRMIM-62A lobe ports and lobe cable is

an important factor in maintaining optimal performance from the network

installation. Basically, impedance is the total resistance, measured in

ohms, that a circuit offers to electrical data signals. Impedance

mismatches between the coaxial lobe cables carrying Token Ring signal

trafﬁc and the lobe ports to which they are connected precipitate excessive

crosstalk, caused by reﬂecting waves in the transmission lines.

To avoid degradation of the quality of Token Ring signal transmission in

the network, use only RG 62 93-ohm cable for all lobe port connections to

the TRMIM-62A.

2.3.2 Recommended Lobe Lengths

The length of the cable connecting a station to the trunk coupling unit

(TCU) port on a network module is referred to as the lobe length.

Table 2-1 speciﬁes the recommended maximum lobe lengths per ring

speeds of 4 and 16 Mbps for the TRMIM-62A.

REQUIREMENTS AND SPECIFICATIONS

2-3

2.4 SETTING THE RING SPEED

The default ring speed setting for the TRMIM-62A is 16 Mbps. To set the

ring operating speed (4 or 16 Mbps), position the JP1 jumper on the

setting you want, as shown in Figure 2-1. See Section 2.4.1 for

information about how, under certain circumstances, a

management-module ring speed setting may override a different ring

speed you specify with the JP1 jumper for the TRMIM-62A.

Figure 2-1 Ring Speed Settings

Table 2-1 Recommended Lobe Lengths

Lobe Cable Type

Maximum Lobe Length

4 Mbps 16 Mbps

RG 62 Coaxial (Used Exclusively)

300 meters 100 meters

(1000 feet) (330 feet)

NOTE

The recommended lobe lengths in Table 2-1 may be exceeded

in an optimally designed coaxial terminal network, using RG 62

coaxial throughout and having a minimum number of BNC

connector splices on long lobe length cables.

JP1

4Mb

16Mb

4Mb

16Mb

For a 4Mb setting: slide the jumper over pins 1 & 2.

For a 16Mb setting: slide the jumper over pins 2 & 3.

NOTE: The pins are not

numbered on the component board.

REQUIREMENTS AND SPECIFICATIONS

2-4

2.4.1 Management Conﬁguration Overrides

A Token Ring management module in the MMAC “remembers” the

position and ring speed setting for each Token Ring module in the hub

that it controls. The default response by any Token Ring management

module to a TRMIM-62A conﬁgured to run at a ring speed incompatible

for the slot in which the board is initially installed is to bypass it from the

ring. Under certain circumstances, some management modules will

override a different JP1 ring speed setting for the TRMIM-62A. Other

management modules, however, bypass the TRMIM-62A every time it is

installed or reinstalled in the MMAC with a ring speed incompatible with

the slot’s original conﬁguration.

In either a

TRMM-

or a

TRMMIM-managed

ring, the

management-speciﬁed ring speed overrides the JP1 ring speed setting on

a TRMIM-62A under the following conditions:

• A TRMIM-62A is removed from the MMAC and then reinserted into

its original slot with a different JP1 ring speed setting.

For example, the TRMIM-62A JP1 jumper is changed from the 16

Mbps setting, which is stored in the management module’s memory

when the MIM is originally installed, to a 4 Mbps setting. When it is

reinserted in the MMAC, the 16 Mbps ring speed setting prevails over

the 4 Mbps setting. The TRMIM-62A continues to run at 16 Mbps,

even though its JP1 ring speed jumper is now set at 4 Mbps.

• A replacement TRMIM-62A with a ring speed setting different from

the original MIM is installed in the same slot.

To nullify the management override and establish an isolated ring

supported by the TRMIM-62A running at a different ring speed in the

MMAC, you can try any of the following procedures:

• Reinsert the TRMIM-62A in a slot other than its original slot after you

have changed the JP1 setting.

• Use Local Management for the TRMM or TRMMIM to temporarily

put the TRMIM-62A in “Auto” mode before switching back to the

“Management” mode after you have changed the JP1 setting and

reinserted the TRMIM-62A back into its original slot.

• Temporarily insert a different type of MIM in the TRMIM-62A slot

before reinserting the TRMIM-62A after you have changed the JP1

setting.

REQUIREMENTS AND SPECIFICATIONS

2-5

See the

TRMM/TRMMIM Local Management User’s Guide

for more

information about operational modes and other network-conﬁguration

applications.

If the ring is managed by either a

TRMM-2

, a

TRMM-4

or a

TRBMIM-T

management board, a TRMIM-62A with a different JP1

ring speed setting retains its setting and is bypassed from the ring under

all circumstances.

2.5 GENERAL SPECIFICATIONS

This section provides safety and physical speciﬁcations.

2.5.1 Safety

This product meets the requirements of UL1950, CSA C22.2 No. 950,

EN60950, IEC950, and 73/23/EEC.

2.5.2 Electromagnetic Compatibility (EMC)

This product meets the emission limits of FCC Part 15, Class A, EN55022

Class A, and VCCI Class I. This product meets the immunity

requirements of EN50082-1

2.5.3 Physical

Dimensions 13.4D x 11.5H x 2.0W inches

(34.0D x 29.2H x 5.1W centimeters)

Weight Under 4 pounds

(1.82 kilograms)

2.5.4 Environmental

Operating Temperature 5° to 40° C

Storage Temperature -30° to 90° C

Relative Humidity 5% to 95% non-condensing

NOTE

Network-conﬁguration settings speciﬁed by the management

module are stored in the management module’s Non-Volatile

Random Access Memory (NVRAM). For information about how

to clear NVRAM, see the user’s guide included with the

management module.

REQUIREMENTS AND SPECIFICATIONS

2-6

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Brand: Cabletron Systems

Model: TRMMIM

Type: User manual

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